Effects of Material Functionalization on the Interface Quality

Date: 
Monday, February 27, 2017 - 10:30am
Location: 
3110 Etcheverry Hall
Speaker: 
Dr. Evgeniya H. Lock

Materials Science and Technology Division

Naval Research Laboratory

About: 

Optimal performance of biosensors, flexible electronic devices, and even superconducting qubits depends on successful integration of different material types and thus on careful interface design. In this talk, I will discuss the production and characterization of biotic/abiotic and abiotic organic and inorganic interfaces. Most of the work is based on combination of plasma-based (dry) and self-assembled monolayers (wet chemistry) approaches for polymer surface modification. We have shown that polymer surface chemistry and morphology affects protein and peptide immobilization, and thus their biosensing performance.

 

In the second part of the talk, I will present the fabrication of graphene/polymer laminates. Here, I will discuss polymer surface modification strategies for preferential graphene attachment. Our results suggest that the electrical properties of graphene depend on the chemical, structural and morphological properties of the graphene/polymer interfaces. It should also be noted that the electrical properties of graphene on polystyrene and polyethylene are better than the conducting organic polymers. Finally, I will share our preliminary work on surface modification of silicon, how it affects the TiN/Si interface and the respective quality factors of superconducting qubits.

 

This work was supported by the Naval Research Laboratory Base Program.

 

Biography:

Evgeniya H. Lock received her Ph.D. in Mechanical Engineering from the University of Illinois at Chicago in 2006 for her study on pulsed corona discharge initiation at atmospheric and supercritical conditions. She started as an NRC Fellow at the Plasma Physics Division at the U.S. Naval Research Laboratory, which she joined as a staff scientist three years later. Currently, she is in the Electronic and Optical Materials & Sensors Section at Materials Science and Technology Division. Her research interests include 2D materials, including graphene, MoS2, boron nitride, hybrid systems, biosensors, and flexible electronics. She has over 50 publications, two patents, three patent applications, two Alan Berman publication awards, and two NRC/ASEE postdoctoral publication awards. 

 

Hosted by: Professor Kyriakos Komvopoulos, 5143 Etcheverry Hall, 510- 642-2563, kyriakos@me.berkeley.edu